<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Filter
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: Lzf.php 24593 2012-01-05 20:35:02Z matthew $
 */
/**
 *
 * @see Zend_Filter_Compress_CompressInterface
 */
require_once 'Zend/Filter/Compress/CompressInterface.php';

/**
 * Compression adapter for Lzf
 * @category Zend
 * @package Zend_Filter
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
class Zend_Filter_Compress_Lzf implements Zend_Filter_Compress_CompressInterface {

    /**
     * Class constructor
     */
    public function __construct () {
        if ( ! extension_loaded ('lzf')) {
            require_once 'Zend/Filter/Exception.php';
            throw new Zend_Filter_Exception ('This filter needs the lzf extension');
        }
    }

    /**
     * Compresses the given content
     * @param string $content
     * @return string
     */
    public function compress ($content) {
        $compressed = lzf_compress ($content);
        if ( ! $compressed) {
            require_once 'Zend/Filter/Exception.php';
            throw new Zend_Filter_Exception ('Error during compression');
        }
        return $compressed;
    }

    /**
     * Decompresses the given content
     * @param string $content
     * @return string
     */
    public function decompress ($content) {
        $compressed = lzf_decompress ($content);
        if ( ! $compressed) {
            require_once 'Zend/Filter/Exception.php';
            throw new Zend_Filter_Exception ('Error during compression');
        }
        return $compressed;
    }

    /**
     * Returns the adapter name
     * @return string
     */
    public function toString () {
        return 'Lzf';
    }

}
